A aggravating problems in forest management is weed interference, which is a factor that modifies adaptation and reduces plant growth. The use of herbicides is an indispensable practice to mitigate these effects in reforestation areas. This study aimed to evaluate the selectivity of glyphosate and imazapyr in native plants of the Brazilian Cerrado, such as: Schinus terebinthifolia (Anacardiaceae), Peltophorum dubium (Fabaceae) and Handroanthus albus (Bignoniaceae). The trial was carried out in a greenhouse at Unit of Aquidauana/UEMS. Experimental design was completely randomized, with seven treatments and five replications. Selectivity of the herbicides in the seedlings of these species was evaluated at 7, 14, 21, 28 and 60 days after application (DAA) of the herbicides, by means of a percentage scale of notes, where 0% corresponds to no injury and 100% corresponds to plant death. At the same time, for the weed control evaluation, visual analysis was also performed at 7, 14, 21, 28 and 60 DAA of the herbicides, where 100% was considered plant death and 0% no injury to weed. Imazapyr herbicide, when applied in the initial post-emergence in its lower level, it is selective to the tree species, but in the other concentrations it can affect differently the survival of them. Glyphosate herbicide was the least selective to the tree species in its different concentrations, causing phytotoxic effects with changes in the seedlings morphology. The results of this study could help in the integrated management of weeds and contribute to the efficient herbicide use in planting forest species in the Cerrado.
RESUMO O carvão vegetal é um recurso natural renovável e pode ser usado como agente redutor em siderúrgicas na fabricação de ferro tipo gusa e como fonte de energia. Este trabalho teve como objetivo analisar os custos e da viabilidade econômica para produção de carvão vegetal proveniente de florestas nativas no estado de Mato Grosso do Sul, em um sistema produtivo de fornos do tipo "rabo-quente". O estudo foi realizado em uma carvoaria localizada no município de Nioaque-MS. No cálculo do custo operacional foi adotada a estrutura utilizada pelo Instituto de Economia Agrícola de São Paulo, agrupando-os em: Custo Operacional Efetivo (COE), Custo Operacional Total (COT) e Custo Total de Produção (CTP). Na análise da viabilidade econômica do investimento, foram determinados: Valor Presente Líquido (VPL), Taxa Interna de Retorno (TIR), Razão Benefício-Custo (B/C) e Período de Recuperação do Capital inicial investido (PRC). Observou-se que aproximadamente 87,4% do COE era composto por despesas com insumos. A análise de rentabilidade demonstrou uma receita líquida de R$ 748.077,38, com lucratividade de 65,5%. Em relação a viabilidade econômica, o produtor conseguiu recuperar o investimento a partir do 2º ano de produção. O estudo evidencia a importância de analisar economicamente os empreendimentos de produção de carvão vegetal, e demonstra que a produção de carvão vegetal no sistema produtivo de forno tipo "rabo quente" é viável economicamente. Palavras-chave: gestão; indicadores econômicos; "rabo-quente"; rentabilidade. Costs and economic viability in charcoal production in the state of Mato Grosso do Sul ABSTRACT Charcoal is a renewable natural resource and can be used as a reducing agent in the steel making pig iron and a source of energy. This study aimed to analyze the costs and economic viability for the production of charcoal as of native forests in Mato Grosso do Sul, in the productive system of kilns "rabo quente". The study was performed in a charcoal localized in municipality of Nioaque-MS. In the calculate the operating cost was used the model proposed by the Instituto de Economia Agrícola from São Paulo, grouping in: Effective Operating Cost (EOC), Total Operating Cost (TOC) and Total Cost of Production (TCP). In analyzing the economic viability of investment, were determined: Net Present Value (NPV), Internal Rate of Return (IRR), Benefit-Cost Reason (B/C), and Pay Back Period. It was observed that expenses of inputs composed approximately 87.4% of the COE. Profitability analysis showed a net income of R$ 748077.38, with profitability of 65.5%. In relation to economic viability, the farmer can recover the investment from the 2rd year of production. The study highlights the importance of economic analysis of the charcoal production enterprises, and demonstrates that the production of charcoal in the productive system of kilns "rabo quente" is economically viable.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
334 Leonard St
Brooklyn, NY 11211
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.